Traditional surveying methods are based on the use of instruments such as tape measures, levels, theodolites, and total stations to measure distances, angles, and elevations. These methods are reliable, accurate, and well-established, but they also have some limitations. They require a lot of fieldwork, manpower, and equipment, which can increase the cost and time of the survey. They also depend on the visibility and accessibility of the survey points, which can be affected by weather, vegetation, obstructions, and hazards. Traditional surveying methods are suitable for small to medium-sized projects that require high accuracy and precision, such as boundary surveys, topographic surveys, and construction surveys.
It is not about small to medium project, it is about what kind project we will do, example we can not do setting out using lidar or scanner, but Total station can, mean every survey equipment have differents function, but we can combine all this stuff to support project more fast, site preparation data surface we can use lidar, but when we get into design contruction, infrastructure how ever surveyor need total station auto level..
Topografia & Geodesia
El objeto del trabajo determina la metodología. El objeto es siempre un equilibrio entre diferentes intereses, depende de cuales prevalezcan, se diseña la estrategia. A menudo la puja es entre tolerancias métricas y tiempos. Una vez que estas condiciones de borde están establecidas , se arma el plan de trabajo , que suele implicar coordinar el empleo de, instrumental y metodología. Las determinantes de instrumental son las especificaciones técnicas, y las de la metodología aquellas que saquen el mayor provecho del instrumental seleccionado (si son técnicas GNSS por ej. , se selecciona la mejor arquitectura de red , momento y tiempo de observación entre otras). Resumiendo, el instrumental obedece al objeto de estudio.
In my opinion understanding of each technique's strengths, limitations, and suitability for the project's specific requirements. Here is a systematic approach to evaluation and comparison: 1-Project Requirements: -Purpose of Survey: Define the end goal of the survey. Is it for construction, topography, mapping, or another purpose? -Accuracy Needs: Determine the level of precision necessary for the project. High-precision projects, like construction, may require different methods compared to broader landscape assessments. -Scale and Scope: Consider the size of the area to be surveyed and the level of detail required.
Evaluating and comparing surveying methods or techniques for a specific project or purpose involves several key steps. Firstly, it's crucial to understand the project requirements and objectives thoroughly. This includes identifying the spatial resolution, accuracy, and precision needed. Secondly, research and identify available surveying methods that could meet these requirements, considering traditional techniques like total station surveys, GPS surveys, as well as newer technologies such as LiDAR or photogrammetry. Thirdly, assess the advantages and limitations of each method in terms of cost, time, equipment requirements, and suitability for the project's terrain and environment.
Modern surveying methods are based on the use of technologies such as GPS, GNSS, LiDAR, photogrammetry, and remote sensing to collect spatial data. These methods are fast, efficient, and versatile, but they also have some challenges. They require specialized skills, software, and hardware, which can increase the complexity and cost of the survey. They also depend on the quality and availability of the data sources, which can be affected by errors, noise, interference, and resolution. Modern surveying methods are suitable for large-scale projects that require low to medium accuracy and coverage, such as mapping, monitoring, and environmental surveys.
2-Method Suitability: -Terrain and Accessibility: Evaluate how the physical characteristics of the site affect the surveying methods. Certain methods work better in rugged terrains, while others are suited for urban environments. 3-Method Characteristics: -Accuracy and Precision: Review the inherent accuracy of the techniques. -Time Efficiency: Consider how long it takes to perform the survey with each method and the impact on overall project timelines. -Cost Effectiveness: Assess the cost of labor, equipment, and processing for each method -Data Types and Quality: Examine what types of data each method produces and the quality and resolution of this data.
Hybrid surveying methods are based on the combination of traditional and modern surveying methods to achieve the best results for a given project or purpose. These methods are flexible, adaptable, and comprehensive, but they also have some trade-offs. They require careful planning, coordination, and integration of the different methods, which can increase the difficulty and risk of the survey. They also depend on the compatibility and consistency of the data formats, standards, and protocols, which can affect the quality and reliability of the data. Hybrid surveying methods are suitable for complex and diverse projects that require a balance of accuracy, cost, time, and scope, such as urban planning, infrastructure development, and disaster management.
4-Technical Requirements: -Equipment Needs: Identify what equipment is needed for each method and its availability. -Technical Expertise: Determine the level of expertise required to operate the equipment and interpret the results. 5-Environmental Considerations: -Impact on Environment: Evaluate how each method interacts with the environment – some methods are non-intrusive while others may require physical contact or alteration of the site. -Sustainability: Consider eco-friendly options when surveying protected or sensitive areas.
To compare different surveying methods or techniques for a given project or purpose, you need to consider the objectives and specifications of the project, the characteristics and constraints of the site and environment, as well as the resources and capabilities of the survey team and client. Evaluating these factors will help you select the most appropriate surveying method or technique for your project or purpose. Additionally, tools such as cost-benefit analysis, SWOT analysis, or decision matrix can assist in making an informed decision.
6-Data Processing and Analysis: -Data Processing Time: Account for the time required to process and analyze data gathered through each method. -Software and Analysis Tools: Determine the need for and availability of specialized software tools required to make sense of the data collected. 7-Risk Management: -Operational Risks: Assess the risk associated with each method,such as potential for equipment failure, human error, or data loss. -Environmental Risks: Consider the potential for adverse environmental impacts and how they can be mitigated. 8-Integration with Other Systems: -Compatibility and Integration: Ensure that the surveying method's data outputs can be integrated with existing systems used in the project, like GIS or CAD software.
As a Contractor When we want to control the layout on a construction site a control loop is preferred. Resections are extremely accurate and make it much easier to control elevation